valve
UK: vælv | US: vælv
n. a mechanical device that controls the flow of a fluid (liquid or gas) by opening, closing, or partially obstructing a passage
n. (anatomy) a membranous structure in a hollow organ that prevents backward flow of fluid
n. (music) a device in brass instruments that alters the pitch by changing the length of the air column
The word "valve" traces back to Latin valva, referring to the folding leaves of a door. This metaphorically extended to mechanical and anatomical structures that "open and close" like doors. The silent "e" in English preserves the spelling but does not contribute to meaning. The word’s evolution reflects its functional similarity to movable barriers, whether in pipes, hearts, or musical instruments.
The plumber replaced the faulty valve to stop the water leak.
The heart’s mitral valve ensures blood flows in one direction.
Trumpet players use valves to change notes smoothly.
The engineer designed a pressure-sensitive valve for the pipeline.
A stuck valve in the engine caused the car to overheat.